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How to Get Data from MongoDB using Node.js?
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Hotel Booking System using Node.js and MongoDB

Last Updated : 29 Jul, 2024
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In the hotel booking system, there will be a user for him/her name, email, and room no. they will get after booking. for that, we have to make schema, and as well as we have two APIs. One API for getting data from the database and another API sending data to the database room no, name, email, and all. 

Prerequisite:

  • NodeJS installed in your system (install)
  • MongoDB installed in your system (install)
  • Postman desktop or Thunderclient VScode extension (install)

Project setup and Module Installation:

Step 1: Go to your folder where you want to create the API and open it in your IDE and also cmd or PowerShell and run:

npm init -y

Step 2: Create a file named index.js using the following command:

touch index.js

Step 3: Now Install the mongoose and MongoDB module using the following command:

npm i express mongoose mongodb cors

 Project Structure: It will look like this. 

Project directory

Example: Now write down the following code in the index.js file

index.j 
// To connect with your mongoDB database const mongoose = require('mongoose');  mongoose.connect(   'mongodb://localhost:27017/',   {     dbName: 'yourDB-name',     useNewUrlParser: true,     useUnifiedTopology: true,   },   (err) => (err ? console.log(err) :      console.log('Connected to yourDB-name database')), );  // Schema for hotel Booking const UserSchema = new mongoose.Schema({   name: {     type: String,   },   email: {     type: String,     required: true,     unique: true,   },   roomNo: {     type: String,     required: true,   },   date: {     type: Date,     default: Date.now,   }, });  const RoomBooked = mongoose.model('users', UserSchema); RoomBooked.createIndexes();  // For backend and express const express = require('express'); const cors = require('cors');  const app = express(); app.use(express.json()); app.use(cors());  app.get('/', (req, resp) => {   resp.send('App is Working'); });  // Register data to book hotelroom app.post('/register', async (req, resp) => {   try {     const user = new RoomBooked(req.body);     let result = await user.save();     result = result.toObject();     if (result) {       delete result.password;       resp.send(req.body);       console.log(result);     } else {       console.log('User already register');     }   } catch (e) {     resp.send('Something Went Wrong');   } });  // Getting roombooked details app.get('/get-room-data', async (req, resp) => {   try {     const details = await RoomBooked.find({});     resp.send(details);   } catch (error) {     console.log(error);   } });  // Server setup app.listen(5000, () => {   console.log('App listen at port 5000'); });

Run the application: Run the following command to start the application:

node index.js

Output: API is created for booking rooms and getting details. 

For Register or booking

http://localhost:5000/register

Get booked data from the database

http://localhost:5000/get-room-data
Note: If you open your MongoDB you can see this data within it 

Next Article
How to Get Data from MongoDB using Node.js?
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